.tab {
  width: 500px;
  margin: 0 auto;
  .tab_btn {
    li {
      float: left;
      width: 100px;
      height: 40px;
      line-height: 40px;
      font-size: 18px;
      text-align: center;
      cursor: pointer;
      &.cur {
        background: cornflowerblue;
        color: #fff;
      }
    }
  }
  .tab_list {
    li {
      display: none;
      border: 1px solid cornflowerblue;
      height: 200px;
      &.cur {
        display: block;
      }
    }
  }
}
